Applied Mathematics and Mechanics (English Edition) ›› 2024, Vol. 45 ›› Issue (11): 1987-2010.doi: https://doi.org/10.1007/s10483-024-3179-6

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Torsional vibration suppression and electromechanical coupling characteristics of electric drive system considering misalignment

Jinxin DOU1, Zhenping LI2, Hongliang YAO1,*(), Muchuan DING1, Guochong WEI1   

  1. 1 School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
    2 China North Vehicle Research Institute, Beijing 100072, China
  • Received:2024-04-19 Online:2024-11-03 Published:2024-10-30
  • Contact: Hongliang YAO E-mail:hlyao@mail.neu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52075084);the National Natural Science Foundation of China(52475094);the Fundamental Research Funds for the Central Universities of China(N2303005);Project supported by the National Natural Science Foundation of China (Nos. 52075084 and 52475094) and the Fundamental Research Funds for the Central Universities of China (No. N2303005)

Abstract:

The torque ripples resulting from external electromagnetic excitation and mechanical internal excitation contribute to significant torsional vibration issues within electromechanical coupling systems. To mitigate these fluctuations, a passive control strategy centered around a multi-stable nonlinear energy sink (MNES) is proposed. First, models for electromagnetic torque, gear nonlinear meshing torque, and misalignment torque are established. Building upon this foundation, an electromechanical coupling dynamic model of the electric drive system is formulated. Sensitivity analysis is conducted to determine the sensitive nodes of each mode and to provide guidance for the installation of the MNES. The structure of the MNES is introduced, and an electromechanical coupling dynamic model with the MNES is established. Based on this model, the influence of the misaligned angle on the electromechanical coupling characteristics is analyzed. In addition, the vibration suppression performance of the MNES is studied under both speed and uniform speed conditions. Finally, experimental testing is conducted to verify the vibration suppression performance of the MNES. The results indicate that misalignment triggers the emergence of its characteristic frequencies and associated sidebands. Meanwhile, the MNES effectively mitigates the torsional vibrations in the coupled system, demonstrating suppression rates of 52.69% in simulations and 63.3% in experiments.

Key words: electric drive system, electromechanical coupling, nonlinear energy sink (NES), misalignment

2010 MSC Number: 

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